[libpng16] Clone zlib into the oss-fuzz zlib project and build zlib alongside libpng.

ANNOUNCE

-Libpng 1.6.35beta01 - September 29, 2017
+Libpng 1.6.35beta01 - October 1, 2017
 
 This is not intended to be a public release. It will be replaced
 within a few weeks by a public version or by another test version.
@@ -24,8 +24,10 @@ Other information:
 
 Changes since the last public release (1.6.34):
 
-Version 1.6.35beta01 [September 29, 2017]
-  Restored 21 of the contrib/pngsuite/i*.png, which were correct.
+Version 1.6.35beta01 [October 1, 2017]
+  Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
+    failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
+  Clone zlib into the oss-fuzz zlib project and build zlib alongside libpng.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

CHANGES

@@ -6038,11 +6038,12 @@ Version 1.6.33 [September 28, 2017]
   Add end_info structure and png_read_end() to the libpng fuzzer.
 
 Version 1.6.34 [September 29, 2017]
-  Removed contrib/pngsuite/i*.png; some of these were incorrect and caused
-    test failures.
+  Removed contrib/pngsuite/i*.png; some of caused test failures.
 
-Version 1.6.35beta01 [September 29, 2017]
-  Restored 21 of the contrib/pngsuite/i*.png, which were correct.
+Version 1.6.35beta01 [October 1, 2017]
+  Restored 21 of the contrib/pngsuite/i*.png, which do not cause test
+    failures. Placed the remainder in contrib/pngsuite/interlaced/i*.png.
+  Clone zlib into the oss-fuzz zlib project and build zlib alongside libpng.
 
 Send comments/corrections/commendations to png-mng-implement at lists.sf.net
 (subscription required; visit

contrib/oss-fuzz/Dockerfile

@@ -16,9 +16,10 @@
 
 FROM gcr.io/oss-fuzz-base/base-builder
 MAINTAINER glennrp@gmail.com
-RUN apt-get update && apt-get install -y make autoconf automake libtool zlib1g-dev
+RUN apt-get update && \
+    apt-get install -y make autoconf automake libtool
 
+RUN git clone --depth 1 https://github.com/madler/zlib.git
 RUN git clone --depth 1 https://github.com/glennrp/libpng.git
-RUN (cd libpng; git log | head -1)
+RUN cp libpng/contrib/oss-fuzz/build.sh $SRC
 WORKDIR libpng
-COPY build.sh $SRC/

contrib/oss-fuzz/README.txt

@@ -24,13 +24,13 @@ The files are
  Filename                   or derived   Copyright          License
  =========================  ==========   ================   ==========
  Dockerfile*                derived      2017, Glenn R-P    Apache 2.0
- build.sh*                  derived      2017, Glenn R-P    Apache 2.0
+ build.sh                   derived      2017, Glenn R-P    Apache 2.0
  libpng_read_fuzzer.cc      derived      2017, Glenn R-P    Chromium
  libpng_read_fuzzer.options original     2015, Chrome Devs  Chromium
  png.dict                   original     2015, Chrome Devs  Chromium
  README.txt (this file)     original     2017, Glenn R-P    libpng
 
- * Dockerfile and build.sh are copies of the files used by oss-fuzz.
+ * Dockerfile is a copy of the file used by oss-fuzz. build.sh,
    png.dict and libpng_read_fuzzer.* are the actual files used by oss-fuzz,
    which retrieves them from the libpng repository at Github.
 

contrib/oss-fuzz/build.sh

@@ -14,12 +14,13 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-# Last changed in libpng 1.6.33 [September 28, 2017]
+# Last changed in libpng 1.6.35 [October 1, 2017]
 #
-# Revisions by Glenn Randers-Pehson, 2017:
+# Revisions by Glenn Randers-Pehrson, 2017:
 # 1. Build only the library, not the tools (changed "make -j$(nproc) all" to
 #     "make -j$(nproc) libpng16.la").
 # 2. Disabled WARNING and WRITE options in pnglibconf.dfa.
+# 3. Build zlib alongside libpng
 ################################################################################
 
 # Disable logging via library build configuration control.
@@ -30,14 +31,17 @@ cat scripts/pnglibconf.dfa | \
 > scripts/pnglibconf.dfa.temp
 mv scripts/pnglibconf.dfa.temp scripts/pnglibconf.dfa
 
-# build the library.
+# build zlib library.
+(cd ../zlib; ./configure; make -j$(nproc) clean; make -j$(nproc) all)
+
+# build the libpng library.
 autoreconf -f -i
-./configure
+CPPFLAGS="-I../zlib" LDFLAGS="-L../zlib" ./configure
 make -j$(nproc) clean
 make -j$(nproc) libpng16.la
 
 # build libpng_read_fuzzer.
-$CXX $CXXFLAGS -std=c++11 -I. \
+$CXX $CXXFLAGS -std=c++11 -I. -I../zlib -L../zlib \
      $SRC/libpng/contrib/oss-fuzz/libpng_read_fuzzer.cc \
      -o $OUT/libpng_read_fuzzer \
      -lFuzzingEngine .libs/libpng16.a -lz

contrib/oss-fuzz/libpng_read_fuzzer.cc

@@ -5,7 +5,7 @@
 // Use of this source code is governed by a BSD-style license that may
 // be found in the LICENSE file https://cs.chromium.org/chromium/src/LICENSE
 
-// Last changed in libpng 1.6.32 [August 24, 2017]
+// Last changed in libpng 1.6.34 [September 27, 2017]
 
 // The modifications in 2017 by Glenn Randers-Pehrson include
 // 1. addition of a PNG_CLEANUP macro,
@@ -138,7 +138,7 @@ extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
   png_read_info(png_handler.png_ptr, png_handler.info_ptr);
   png_handler.row_ptr = png_malloc(
       png_handler.png_ptr, png_get_rowbytes(png_handler.png_ptr,
-                                               png_handler.info_ptr));
+                                            png_handler.info_ptr));
 
   // reset error handler to put png_deleter into scope.
   if (setjmp(png_jmpbuf(png_handler.png_ptr))) {